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These are three different problems. The misfire for the number 2 cylinder may be a failed coil or spark plug, and this should be taken care of first. The EVAP leak would need to tested to see if the system has a leaking gas cap or a purge valve leak. I have seen both problems. The last item for the O2 sensor can be caused by the other 2 problems and would need to be looked at after the other checks are done. If you want to have this taken care of, a technician from YourMechanic can come to your home or office to diagnose the misfire issue and O2 sensor problem to pinpoint what repairs should be done.

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Q: Replaced chewed wires fixed the problem, but only for a little while.

Hello, having damaged wiring can cause all kinds of issues, the only proper way to repair wiring is to cut off the damaged portion, strip the wiring, then solder the wiring together and use wiring shrink tubing to cover up...

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